Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e4ddaf20a08bff9…

MALICIOUS

PDF

104.5 KB Created: 2021-09-08 10:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 63227dc9c381ba4280d8fdab1cce8eb4 SHA-1: 16b7f184c72ac5eee232e84e068c103501ba7e8b SHA-256: 6e4ddaf20a08bff95ae24740a267d68e7725f22864950068c412f1d4c50298cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to malicious or compromised sites, likely for phishing or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ptairsupply.com/userfiles/file/lufenetuwoloveb.pdf In PDF document text
    • http://www.jindatunnel.com/up_files/file/zosajuzojivitasepe.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160889e463c2e2---67551161551.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/6602206295.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/30952138310.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/junk14m8k4c8l7kpbrns8kmoh1/51455114818.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611adf51d9923---78088145146.pdfIn PDF document text
    • http://imoroz.by/upload/file/53810866346.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/jovafofobimulirujepumovu.pdfIn PDF document text
    • http://aquatrustfina.com/userfiles/file/dasonumasasopovo.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/40754276195.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/dupit.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339937980b1---jibeziteterura.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/21f730166c9e4680c25ab2e29f1e7516/81173104155.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6657514489---25694115945.pdfIn PDF document text
    • http://zkojicin.cz/userfiles/file/duzip.pdfIn PDF document text
    • https://socohoteldanang.com/uploads/image/files/vasapinumobelakonow.pdfIn PDF document text
    • http://thietbiotovn.com/Images_upload/files/badewusugozolamenewiret.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/95170290375.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/41100976977.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084e3069a06d---novaragukixowe.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/jokotos.pdfIn PDF document text
    • http://global-leasing-management.com/uf/file/goxazosefupanivuwuzobi.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/36135696523.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=aixam+crossline+workshop+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13152 18964 bytes
SHA-256: 57dac2be3911e32d71edea8338c4fea1c56323995279de8c355ee718a591d210
font_01_sfnt_off00016313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16313 10900 bytes
SHA-256: 08fe1adb5e60e31e6d14d645ca6dae82e21514f2d04fd3db2cfd492d56dec01e
font_02_sfnt_off00017c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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